I am installing some new injectors for my SC set up. They are ID 1000s. I bought them used so i have no instructions. They came with 6 washers (3 regular and 3 the spring kind. don't know their name).they only would fit on the upper part of the studs that would go through the fuel rail. I didn't have new orings so I used the old ones. As a result the injectors leaked when I pressurized the system. Also, I stripped one of the studs because the nut wouldn't go around it once the 2 washers were on it. I took it back apart and got some similar orings along with new washers. I put just 1 new washer on the BOTTOM of each stud and took off the 2 each on top. The system doesn't seem to be leaking now but I don't know if I need more washers or not.

what I really need to know is how many washers I need since I have bigger injectors and where exactly they go. Right now I only got washers for the studs and not sure if I need more than 1 per stud. I never connected the 2 bolts that went directly into the intake manifold as I don't know if i need washers on them or not.